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December 24th, 2007, 4:09 pm
Forum: Brainteaser Forum
Topic: White, Black, 1, 0
Replies: 7
Views: 63394

### White, Black, 1, 0

1> Suppose on a chessboard of dimensions 1998 X 2002, there are 1's and 0's. 2> Now sum of every row is odd and sum of every column is odd.Then show that the total number of white cells with 1's is even.
December 24th, 2007, 1:58 pm
Forum: Brainteaser Forum
Topic: Average waiting time at a bus stop
Replies: 14
Views: 70842

### Average waiting time at a bus stop

<t>Or you can do plain old averaging. look at the 2 intervals: 10 and 20[.....10.....] [..........20..........]Prob to arrive in the 10 interval = 1/3 and 20 interval is 2/3If you arrive in the 10 interval, the average time you wait = 5 minIf you arrive in the 20 interval, the average time you wait ...
December 11th, 2007, 3:50 pm
Forum: Brainteaser Forum
Topic: A probably easy Combinatorics problem
Replies: 36
Views: 68624

### A probably easy Combinatorics problem

<t>"To chop the list {1, 2  n} into k pieces we must make k-1 partitions among the n-1 possible places for a partition. There are C(n-1,k-1) distinct instances of such partitions."Timeds, I am having trouble with this --Suppose I have 3 balls and 2 buckets... Then by the above partitioning you are ...
December 10th, 2007, 6:57 pm
Forum: General Forum
Topic: Why is the Mar08-Apr08 spread for NatGas so low this year? (only 30c)
Replies: 4
Views: 62932

### Why is the Mar08-Apr08 spread for NatGas so low this year? (only 30c)

<t>This sh*t is almost in contango for 2008 -- what's goin on?? Are inventories at 3500 bb cf calming them out? If so why is there skew on call side? I mean Call(vol) > ATM > Put(vol)With decreasing (or consistent) winter demand and increasing summer demand (for electricity in Southern States), is t...
December 6th, 2007, 2:47 pm
Forum: Student Forum
Topic: Questions on mechanics of a Steepening trade --
Replies: 1
Views: 61462

### Questions on mechanics of a Steepening trade --

<t>Question on mechanics of a Steepening trade --Could some one please explain the exact mechanics if I want to do a steepening trade on the 10y-2y yield curve?Suppose a hedge fund decides to enter a plain-vanilla steepener (on the 10-2 Tsy curve) today and exit it 6 months from now. (Theoretically ...
November 23rd, 2007, 4:49 pm
Forum: General Forum
Topic: pls ignore
Replies: 0
Views: 61699

### pls ignore

pls ignore
November 19th, 2007, 8:49 pm
Forum: General Forum
Topic: Why is the Mar08-Apr08 spread for NatGas so low this year? (only 30c)
Replies: 4
Views: 62932

### Why is the Mar08-Apr08 spread for NatGas so low this year? (only 30c)

Why is the Mar08-Apr08 spread for NatGas so low this year? (only 30c)usually this is >\$1 during this time of the year. Any leads?
November 8th, 2007, 10:51 pm
Forum: General Forum
Topic: Why is the forward curve for WTI downward sloping?
Replies: 5
Views: 63734

### Why is the forward curve for WTI downward sloping?

I thought that crude oil was going to keep on going higher in view of the dollar weakness. So why is the curve forercasting that the prices are going to fall?Why don't more people go long the futures and drive the price up?
November 7th, 2007, 7:25 pm
Forum: General Forum
Topic: Why is the forward curve for WTI downward sloping?
Replies: 5
Views: 63734

### Why is the forward curve for WTI downward sloping?

thanks
November 7th, 2007, 7:08 pm
Forum: Brainteaser Forum
Topic: Toss coin (probability to get zero)
Replies: 4
Views: 64681

### Toss coin (probability to get zero)

PitliptonLook at the difference. of the money you make. It changes by +/-1 with prob 1/2. It is a random walk (prob of going ahead and behind is 1/2). Intuitively, a particle starts from the origin what the prbability it is going to be at the origin after a very long time?
October 29th, 2007, 8:12 pm
Forum: Brainteaser Forum
Topic: product (4 consecutive numbers) = square of integer?
Replies: 3
Views: 64551

### product (4 consecutive numbers) = square of integer?

I agree it was a simple one.
October 29th, 2007, 5:15 pm
Forum: Brainteaser Forum
Topic: product (4 consecutive numbers) = square of integer?
Replies: 3
Views: 64551

### product (4 consecutive numbers) = square of integer?

HInt: use excel, if you're bad at factoring
October 29th, 2007, 5:14 pm
Forum: Brainteaser Forum
Topic: Number of hair
Replies: 4
Views: 64686

### Number of hair

<r><URL url="http://www.pg.com/science/haircare/hair_twh_23.htmon">http://www.pg.com/science/haircare/hair_twh_23.htmon</URL> avg, we have only .1m hair. So a whole lot people share same hair numbers by the pigoen-hole principle.Also, 50% of the male population is follicularly challenged by 40 and w...
October 24th, 2007, 3:33 pm
Forum: Brainteaser Forum
Topic: Some teasers...
Replies: 23
Views: 100870

### Some teasers...

<t>Here's a general way to solve the candies problem.Let X_1 be the indicator function if candy # 1 is in the bag. So if there is at least one candy of type 1, X_1 = 1, else X_1 = 0.And now look at the sum X_1 + X_2 + ..+ X_50. This is the number of types.To get the average do an exectation on the s...
October 18th, 2007, 3:25 pm
Forum: Brainteaser Forum
Topic: NLHE poker hand (AA vs 33)
Replies: 25
Views: 68761

### NLHE poker hand (AA vs 33)

<r>That is the other extreme. (Dont forget, these bad/gambler-types would call 1k even when the opponent has only 5k remaining -- that is clearly wrong.) What % of gambler-types are there in tourneys anyway? Most players at the start of a tourney are advised to play tighter than their usual range an...
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